Removed unnecessary source code comments.

Reduced stating the obvious (in many cases) in order to improve
readability and reduce lines of code.

bin/apply_basic_settings

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Applies basic system settings.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/apply_basic_settings"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/apply_default_settings

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Applies default settings.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/apply_default_settings"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/create_boot_disk

@@ -1,9 +1,7 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Creates macOS boot disk.
 
-# EXECUTION
 printf "macOS Boot Disk Tips\n"
 printf "  - Use a USB drive (8GB or higher).\n"
 printf "  - Use Disk Utility to format the USB drive as \"Mac OS Extended (Journaled)\".\n"

bin/install_app_store

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs App Store software.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/install_app_store"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/install_applications

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs applications.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/install_applications"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/install_dev_tools

@@ -1,6 +1,5 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs development tooling requirements.
 
 printf "Installing Xcode CLI tools...\n"

bin/install_extensions

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs application extensions.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/install_extensions"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/install_homebrew_casks

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs Homebrew Cask software.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/install_homebrew_casks"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/install_homebrew_formulas

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Installs Homebrew Formula software.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/install_homebrew_formulas"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/restore_backup

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Performs restoration of backup data.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/restore_backup"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else

bin/run

@@ -1,12 +1,7 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Executes the command line interface.
 
-# USAGE
-# ./run.sh OPTION
-
-# LIBRARY
 source lib/installers.sh
 source lib/options.sh
 source lib/reinstallers.sh
@@ -28,7 +23,6 @@ else
   exit 1
 fi
 
-# EXECUTION
 while true; do
   if [[ $# == 0 ]]; then
     printf "\nUsage: run OPTION\n"

bin/setup_software

@@ -1,16 +1,13 @@
 #! /usr/bin/env bash
 
-# DESCRIPTION
 # Sets up and launches (if necessary) installed software.
 
-# SETTINGS
 set -o nounset
 set -o errexit
 set -o pipefail
 IFS=$'\n\t'
 SCRIPT_PATH="$MAC_OS_CONFIG_PATH/bin/setup_software"
 
-# EXECUTION
 if [[ -x "$SCRIPT_PATH" ]]; then
   "$SCRIPT_PATH"
 else